Cooling system



July 7, 1936,

J. C. RAISLEY COOLING SYSTEM Filed Jan. 8, 1934 yea -1- j INVENTOR. E7121 (T5 5267 %TORNEYS.

atented July 193 attests to e sus'rmw .llohn l0. isley, New Haven, Conn, assior to Cool-Rite Products florporation, New aven, Conn, a corporation of melaware poo Application".lanuary d, 1934, Serial No. t5fllll2 d lUlailms.

The present invention has relation to cooling or refrigerating systems of a common type employing apparatus comprising a compressor or pump which is under control of suitable means,

such for example as an expansion valve, for forcing circulation of the refrigerant contained in a coil located within the cooling chamber through which circulation of air is induced by means of a motor driven fan.

A cooling system as above generally referred to is employed with a refrigerator used for the preservation of food products or in other instances when it is desirable to maintain a given degree of humidity in the air and the main object of this invention is to provide improved means whereby the required relative degree of humidity can be maintained at different temperatures of the air.

In practically all systems where a cooling coil is employed the surface of radiation thereof is increased by fins in the form of plates threaded on the coil.

According to the present invention the fins are employed to also regulate or give the correct degree of relative humidity when the system is in use for the preservation or cooling of food products.

It is understood that in the refrigeration of food, at different temperatures, more or less moisture in the food is caused to evaporate thereby the food may become undesirably dried because the moisture so evaporated passes away. With the improved means now introduced the moisture is condensed, collected and retained on said fins in the torm of drops or particles on substantially the entire surface of both sides of the fins thereby holding the condensed moisture in suspended position and materially increasing the area of evaporation.

An embodiment of the invention as applied to a cooling or refrigerating system is more fully described hereinafter with reference to the accompanying drawing wherein- Figure 1 is a side elevation showing the arrangement of the apparatus of a cooling system for which the invention is applicable;

Figure 2 is a front elevation of the same apparatus;

50 Figure 3 is a sectional view taken on line 3-4 V of Figure 4 looking in the direction of the indicating arrow:

Figure 4 is a side elevation of a fin or moistube supporting the fin shown in section, and

( ill. Mew-W3) Figure 5 is an enlarged or exaggerated vertical section of the fin.

In the embodiment shown in the drawing referred to the invention is applied to a cooling system of a common type which requires a cooling chamber such as l enclosing the coil 2 therein and a drain ii is usually provided to carry ofi excess moisture. A fan d driven by a motor 5 is employed to induce circulation of air through the cooling chamber.

The'refrigerant is given a forced circulation through the coil 2 and conductor 6 by means of the compressor or pump i which is under control of the thermostatic expansion valve t in the usual way.

The fins or plates d are threaded on the tubes oi the coil t spaced apart and as said fins are composed of comparatively thin sheet metal a bearing for the fins is provided by drawing out the stock around the central hole to provide the boss it and which boss also may operate as the spacing means for the fins. The fins are formed with a series of indentations preferably square and located on both sides of the fins. The purpose of the indentations is to provide pockets or reservoirs on the surfaces of. the fins to collect and retain the drops or particles of. condensed moisture separated during the defrosting cycle of the coil 2 so that the current of air from the fan will blow the moisture back into the air in a finely atomized state. The edge of the indentations has a tendency to hold the condensed moisture and without these indentations the drops would run together and drip off the bottom edge of the fins and pass away through the drain 3. The pockets H, as stated hereinbefore, collect the condensed moisture which is held suspended over a comparatively large surface thereby materially increasing the area of evaporation. Furthermore, the suri'ace of the fins being broken by the pockets, a turbulence is caused in the forced air current passing over the surface oi the fins.

The improvement hereinbefore described provides means for determinably maintaining the required relative degree of humidity under proper control regardless of external atmospheric conditions.

It will be understood the fins may be variably spaced apart, with the pockets of any suitable shape and located on one side only, therefore it is to be understood, such modifications or any others coming fairly within the terms of claims hereunto appended shall be covered thereby.

I claim:

1. In a system of cooling or refrigeration, a

refrigerating coil, a plurality oi fins or pistes having a central perforation with turned in edges forming a boss threaded on said coil and said or pistes having a series of indentations on Tooth sides thereof alternately wronged forming pockets adapted for the collection and distrliiw tion of moisture.

2. In a system of cooling or refrigeration, refrigerating coil, a. plurality of fins or plat-es threaded on said coil one above the other and said fins or plates having a, series oi indentations on both sides, surfaces thereoi forming pockets adapted for the collection and distribution oi moisture.

3. In a system of cooling or refrigeration, a refrigerating coil, a plurality of fins or pistes threaded one above the other on said coil, means comprising a boss on each tin or plate for spacing no se ess fins or pistes apart and said'flns or plates having a series of substantially square shaped indentations on both sides thereof forming pockets adapted for the collection and distribution of moisture.

i. in combination with a system of and means for cooling or refrigeration comprising a refrigerant coil and a ion for causing forced flow of air, a plurality of fins 01' plates threaded on said coll one above the other to form a broken column and spaced apart from an adjacent column by bosses on said fins or plates, said fins or plates having a series of indentations on both sides forming pockets to receive and suspend collected moisture over an extended surface to increase the area 15 of evaporation under action of the current of air from said fan.

JOHN C. RAISLEY; 

